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Product Name: Chromium (VI) Oxide
Synonyms: Chromic acid anhydride, Chromium trioxide
CAS Number: 1333-82-0
EC Number: 215-607-8
Recommended Use: Used in metal finishing, wood preservation, pigment production
Manufacturer: Contact details provided on container and company website
Emergency Contact Number: Listed on product label and supplier documentation
GHS Classification: Oxidizing solids (Category 1), Acute toxicity (Category 2, 3, 4), Skin corrosion (Category 1A), Carcinogenicity (Category 1B), Specific target organ toxicity
Hazard Statements: May cause cancer by inhalation; causes severe skin burns and eye damage; may cause genetic defects; harmful if swallowed or inhaled; toxic to aquatic life
Pictograms: Skull and crossbones, Corrosion, Exclamation mark, Health hazard, Environment, Flame over circle
Signal Word: Danger
Precautionary Statements: Do not breathe dust, avoid contact with skin and eyes, use only outdoors or in well-ventilated area, wear protective gear
Chemical Name: Chromium (VI) Oxide
Common Name: Chromic acid, Chromium trioxide
Concentration: Typically 99% pure, trace impurities vary by batch
Impurities: Minimal, may include metal residues and moisture
Inhalation: Move affected person to fresh air, keep comfortable, seek immediate medical attention; monitor for respiratory distress and provide oxygen if trained
Skin Contact: Remove contaminated clothing, wash skin with soap and water for at least 15 minutes, seek urgent medical help
Eye Contact: Rinse cautiously with water for 15–20 minutes, hold eyelids apart, remove contact lenses, seek immediate specialist care
Ingestion: Rinse mouth, do not induce vomiting, provide water if conscious, get medical help without delay
Suitable Extinguishing Media: Use water spray, foam, dry chemical or carbon dioxide; avoid dry combustibles due to strong oxidizing action
Special Hazards: Releases toxic chromium fumes and corrosive mists under heat, decomposes to oxygen and other hazardous gases
Protective Equipment: Use full protective gear including self-contained breathing apparatus; approach from upwind
Fire-Fighting Precautions: Prevent runoff from entering drains or watercourses; use water spray to cool containers
Personal Precautions: Wear full protective clothing, respiratory protection and goggles; evacuate unnecessary personnel
Environmental Precautions: Prevent entry to sewers and waterways, contain and control spill
Cleanup Methods: Absorb with inert material like dry sand, collect in suitable waste container, mop area with water and detergent, dispose per regulations
Handling: Avoid dust generation, work in fume hood or well-ventilated area, wear appropriate PPE including gloves and face shield, avoid contact with organic materials and reducing agents
Storage: Store in cool, dry, well-ventilated, secure area away from incompatible substances; keep containers tightly closed and clearly labeled; lock up if possible due to acute toxicity
Incompatibilities: Avoid contact with combustible materials, strong bases, reducing agents, and organic substances; do not store with acids, wood or paper goods
Occupational Exposure Limits: OSHA PEL: 0.005 mg/m3 (as Cr(VI)), NIOSH REL: 0.0002 mg/m3 (as Cr(VI))
Engineering Controls: Use local exhaust ventilation, closed systems or process enclosures; monitor air levels routinely
Personal Protective Equipment: Chemical-resistant gloves, impervious clothing, protective goggles, face shield, NIOSH-approved respirator for dust and vapor
Hygiene Measures: Wash hands before breaks and after work; no food, drink or smoking where this product is used; shower and change clothes after handling
Appearance: Dark red to purple solid, crystalline or granular
Odor: Odorless, but emits irritating mists when damp
Melting Point: 197°C (decomposes)
Boiling Point: Decomposes before boiling
Solubility: Readily soluble in water, forms chromic acid
Density: About 2.7 g/cm3
pH (in solution): Strongly acidic
Vapor Pressure: Negligible at room temperature
Oxidizing Properties: Powerful oxidizer, reacts vigorously with organics
Chemical Stability: Stable in dry conditions but reacts rapidly with water and organic material
Reactivity: Strong oxidizer reacts explosively with fuels, reducing agents, acids, alcohols
Hazardous Decomposition Products: Generates toxic chromium oxides and oxygen; may form explosive mixtures
Conditions to Avoid: Moisture, heat, shock, friction, and contamination by organic or flammable substances
Acute Toxicity: Ingestion, inhalation or dermal exposure can cause severe tissue and organ damage; extremely toxic even at low levels
Chronic Effects: Known human carcinogen, causes lung, nasal and sinus cancer on repeated exposure; damages kidneys, liver and immune system
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Symptoms: Cough, sore throat, shortness of breath, ulceration of nasal septum, severe burns, eye damage, systemic toxicity
Other Health Effects: Sensitization of skin and lungs, reproductive toxicity, genetic damage
Aquatic Toxicity: Highly toxic to aquatic life, rapid bioaccumulation, persistent environmental impact
Mobility in Soil: Significant mobility, contaminates groundwater and soil
Persistence and Degradability: Resists breakdown, accumulates in organisms
Other Adverse Effects: Chromium (VI) compounds classified as priority pollutants under US and international environmental regulations
Waste Disposal Methods: Treat as hazardous waste; follow all local, state and federal guidelines; use licensed chemical waste contractor
Contaminated Packaging: Dispose in compliance with regulations; do not reuse containers; decontaminate with approved agents before recycling
Additional Considerations: Do not release to the environment or landfill; neutralize residues before disposal if possible
UN Number: UN 1463
Proper Shipping Name: Chromium trioxide, anhydrous
Transport Hazard Classes: Class 5.1 (Oxidizer), Class 6.1 (Toxic substance)
Packing Group: I (highest danger)
Environmental Hazards: Marked as marine pollutant
Transport Precautions: Protect from physical damage, keep container upright and tightly closed, placard vehicle according to national and international requirements
TSCA Status: Listed
OSHA Hazards: Carcinogen, highly toxic, oxidizer
SARA 302/304: Extremely hazardous substance under Title III
SARA 313: Subject to reporting requirements as toxic chemical
California Proposition 65: Listed as causing cancer and reproductive toxicity
Other Regulations: Covered under EU REACH, CLP; classified as hazardous chemical under GHS; requires strict workplace controls and training
